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Analog Devices Inc./Maxim Integrated MAX6801UR28D3+T
- Part No.:
- MAX6801UR28D3+T
- Manufacturer:
- Analog Devices Inc./Maxim Integrated
- Category:
- Supervisors
- Package:
- TO-236-3, SC-59, SOT-23-3
- Datasheet:
-
MAX6801UR28D3+T.pdf
- Description:
- IC SUPERVISOR 1 CHANNEL SOT23-3
- Quantity:
- Payment:
- Shipping:
Inventory:1,744
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Product details
Overview
MAX6801UR28D3+T from Maxim Integrated is a precision 2.8V microprocessor supervisory circuit in SOT23-3 package, featuring active-low push/pull RESET output, factory-trimmed 2.80V reset threshold (±3% over -40°C to +125°C), 100ms minimum reset timeout, and guaranteed operation down to VCC = 0.7V. It monitors power supply integrity in battery-powered controllers and embedded systems requiring reliable brownout detection.
For engineers reviewing the MAX6801UR28D3+T datasheet, MAX6801UR28D3+T pinout, MAX6801UR28D3+T application, or MAX6801UR28D3+T equivalent, this page delivers verified electrical specifications, thermal performance data, reset timing behavior, output drive capability at low VCC, and validated alternative parts for industrial-grade μP reset design.
Technical Context
The MAX6801UR28D3+T implements a precision bandgap-based reset comparator with hysteresis, immune to fast VCC transients up to 30µs at 20mV overdrive. Its internal timing circuit generates a fixed 100ms (min) reset pulse after VCC rises above 2.80V, with propagation delay under 30µs during VCC fall at 10V/ms.
This device operates across full industrial temperature range (-40°C to +125°C) with supply current as low as 4µA at 3.0V and 5µA at 5.0V. The push/pull RESET output sinks 1.2mA at VCC ≥ 2.5V with VOL ≤ 0.3V, ensuring robust logic-level assertion into high-impedance microcontroller reset inputs.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Reset Threshold | 2.80V ±3% over -40°C to +125°C - ensures reliable brownout detection at nominal 2.8V rail |
| Reset Timeout Period | 100ms (min) - guarantees sufficient reset hold time for slow-starting μPs and peripherals |
| Supply Current | 4µA at VCC = 3.0V - enables multi-year battery life in portable instrumentation |
| Operating Voltage Range | 0.7V to 5.5V - supports valid RESET assertion even during deep brownout or partial power loss |
| RESET Output Type | Active-low push/pull - drives low without external pull-up, compatible with standard CMOS reset inputs |
| VOL (ISINK = 1.2mA) | ≤0.3V at VCC ≥ 2.5V - meets TTL/CMOS low-level input requirements across full operating range |
| Temperature Range | -40°C to +125°C - qualified for under-hood automotive, industrial control, and harsh-environment applications |
Pinout & Package
MAX6801UR28D3+T is housed in a RoHS-compliant 3-pin SOT23-3 package (outline 21-0051), with 1.3mm × 2.9mm footprint and 0.95mm height. Pin 1 is GND, Pin 2 is active-low RESET output, Pin 3 is VCC input.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 (GND) | Ground reference | Return path for internal comparator and output stage; must be connected directly to system ground plane |
| 2 (RESET) | Active-low push/pull reset output | Asserts logic-low during VCC undervoltage and for 100ms after recovery; drives loads up to 1.2mA |
| 3 (VCC) | Supply voltage input | Monitored power rail input; device remains functional down to 0.7V, enabling early-fail detection |
Key Features
| Feature | Design Value |
|---|---|
| Factory-trimmed reset threshold | 2.80V with ±1.8% tolerance at +25°C and ±3% over full temperature range - eliminates manual calibration |
| Transient-immune reset comparator | Rejects VCC glitches ≤30µs wide at 20mV overdrive - prevents spurious resets in noisy power environments |
| Ultra-low quiescent current | 4µA at 3.0V - reduces standby power in always-on battery-backed systems by >90% vs. legacy supervisors |
| Guaranteed reset validity to 0.7V | RESET remains asserted and electrically valid down to VCC = 0.7V - ensures deterministic behavior during deep brownout |
| Three timeout options | 1ms / 20ms / 100ms min selectable via part number suffix - matches reset timing requirements of diverse μP families |
Applications
| Industrial PLC Controllers | Battery-Powered Data Loggers |
|---|---|
|
Use Scenario: Programmable logic controllers operating in factory-floor environments with fluctuating 3.3V or 2.8V rails subject to motor switching noise. IC Role / Device Role / Timing Role: Primary brownout detector and power-on reset generator, asserting RESET until stable VCC exceeds 2.80V and holding for 100ms. Use Value: Prevents firmware corruption during line sags by guaranteeing μP remains held in reset until power stabilizes - critical for deterministic I/O state recovery. |
Use Scenario: Remote environmental sensors powered by coin-cell batteries, sampling intermittently over years. IC Role / Device Role / Timing Role: Low-power supervisor monitoring 2.8V LDO output, triggering controlled shutdown and wake-up reset sequence. Use Value: 4µA supply current extends battery life beyond 10 years; 0.7V operation detects end-of-life battery collapse before system lockup. |
| Medical Diagnostic Handhelds | Automotive Body Control Modules |
|
Use Scenario: Portable ultrasound or glucose meters using 2.8V core logic, requiring FDA-compliant power sequencing and fault logging. IC Role / Device Role / Timing Role: Certified reset monitor ensuring μC initializes only after regulated 2.8V rail reaches specification and remains stable for ≥100ms. Use Value: Meets IEC 62304 power-up reliability requirements; ±3% threshold tolerance ensures consistent behavior across production units and temperature extremes. |
Use Scenario: Under-dash BCMs powered from vehicle battery (9V–16V), regulating down to 2.8V for microcontroller core. IC Role / Device Role / Timing Role: Brownout protector for 2.8V domain, asserting RESET during cranking dips below 2.80V and holding for full 100ms recovery window. Use Value: -40°C to +125°C qualification ensures operation during engine-off cold soak and under-hood thermal stress; SOT23-3 footprint saves PCB area in space-constrained modules. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar microprocessor reset applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| MAX809TRD3+T | 2.93V reset threshold, 240ms timeout, same SOT23-3 package and push/pull output | Higher threshold better suited for 3.3V systems; longer timeout may delay μP startup unnecessarily in 2.8V designs | Select MAX809TRD3+T only if system requires 2.93V trip point and extended reset hold time |
| TPS3808G12QDBVRQ1 | 2.85V threshold, adjustable timeout (via capacitor), AEC-Q100 Grade 1 qualified, higher ICC (12µA) | Automotive-qualified with extended temp range; capacitor-based timing adds BOM cost and layout sensitivity | Choose TPS3808G12QDBVRQ1 when AEC-Q100 compliance and programmable timeout outweigh ultra-low ICC requirement |
Compared with MAX6801UR28D3+T, MAX809TRD3+T offers higher reset threshold and longer timeout but lacks 2.80V precision; TPS3808G12QDBVRQ1 provides automotive qualification and timing flexibility at the cost of higher current and external component dependency.
Availability
MAX6801UR28D3+T is available at Aetrix Electronics and suitable for industrial PLC controllers, battery-powered data loggers, medical handhelds, and automotive body control modules requiring stable component supply with guaranteed long-term availability.
Supply support for MAX6801UR28D3+T includes scheduled delivery planning, volume procurement assistance, BOM continuity management, traceable sourcing, and lifecycle availability coordination for OEM customers, industrial embedded developers, connected-device designers, and electronics production programs.
Manufacturer
Maxim Integrated (now part of Analog Devices) designs precision analog and mixed-signal ICs for industrial, automotive, and computing applications, emphasizing low power, high reliability, and small form factor.
The MAX6800/MAX6801/MAX6802 family delivers ultra-low-power, factory-trimmed supervisory circuits for microprocessor reset in space- and energy-constrained systems - specifically engineered for deterministic brownout response in 2.8V–5.0V domains.
FAQ
What is the exact reset threshold voltage of MAX6801UR28D3+T and how tightly is it specified?
The MAX6801UR28D3+T has a factory-trimmed nominal reset threshold of 2.80V, with ±1.8% tolerance at +25°C and ±3% tolerance over the full -40°C to +125°C operating range. This is confirmed in Table 1 and Electrical Characteristics section of the official datasheet, where "28" in the part number explicitly denotes the 2.80V variant. The MAX6801UR28D3+T maintains this accuracy without external components or calibration.
Does MAX6801UR28D3+T support operation during severe brownout conditions?
Yes, MAX6801UR28D3+T is guaranteed to maintain correct reset state down to VCC = 0.7V, per Absolute Maximum Ratings and Electrical Characteristics tables. Its internal circuitry remains functional and asserts valid RESET output even as supply voltage collapses - a key differentiator from supervisors requiring ≥1.0V minimum operation. This behavior is intrinsic to the MAX6801UR28D3+T's BiCMOS process and push/pull architecture.
What is the reset timeout period of MAX6801UR28D3+T and is it adjustable?
The MAX6801UR28D3+T features a fixed 100ms minimum reset timeout period, indicated by the "D3" suffix in its part number (D1 = 1ms, D2 = 20ms, D3 = 100ms). This timing is factory-programmed and non-adjustable - no external capacitor or resistor is required or supported. The timeout begins when VCC rises above 2.80V and ensures μP initialization completes before release.
How does the RESET output of MAX6801UR28D3+T behave under low VCC conditions?
The MAX6801UR28D3+T RESET output is an active-low push/pull driver that sinks up to 1.2mA with VOL ≤ 0.3V at VCC ≥ 2.5V, and remains functional down to VCC = 0.7V. Unlike open-drain alternatives, it actively drives low without external pull-up, ensuring clean logic transitions even during marginal supply conditions - a verified characteristic of the MAX6801UR28D3+T's output stage design.
Is MAX6801UR28D3+T pin-compatible with other common reset ICs?
Yes, MAX6801UR28D3+T is pin-compatible with MAX809/MAX810, MAX6326/MAX6327/MAX6328, and MAX6346/MAX6347/MAX6348 per the Benefits and Features section of the datasheet. All share identical SOT23-3 pinout: Pin 1 = GND, Pin 2 = RESET, Pin 3 = VCC. This allows drop-in replacement in existing layouts designed for those parts, provided threshold and timeout requirements align - a documented mechanical and electrical compatibility of MAX6801UR28D3+T.
MAX6801UR28D3+T Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Analog Devices Inc./Maxim Integrated
- Series:
- -
- Package/Case:
- TO-236-3, SC-59, SOT-23-3
- Packaging:
- Tape & Reel (TR)
- Product Status:
- Obsolete
- Programmable:
- Not Verified
- Type:
- Simple Reset/Power-On Reset
- Number of Voltages Monitored:
- 1
- Voltage - Threshold:
- 2.8V
- Output:
- Push-Pull, Totem Pole
- Reset:
- Active Low
- Reset Timeout:
- 100ms Minimum
- Operating Temperature:
- -40°C ~ 125°C (TA)
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- SOT-23-3
MAX6801UR28D3+T FAQ
1.How can I place an order for MAX6801UR28D3+T through Aetrix?
Please submit a Request for Quotation (RFQ) for MAX6801UR28D3+T on Aetrix. Our sales agent will provide a competitive quotation and guide you through the order confirmation once you accept the terms.
2.Are the price and stock information for MAX6801UR28D3+T reliable?
The price and inventory of MAX6801UR28D3+T are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for MAX6801UR28D3+T is usually 5 days.
3.What payment methods are accepted for MAX6801UR28D3+T?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for MAX6801UR28D3+T transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for MAX6801UR28D3+T?
MAX6801UR28D3+T orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your MAX6801UR28D3+T order is processed, you will receive an email with the shipment details and tracking number.
Note: Tracking information may take up to 24 hours to appear. Express delivery typically takes 3–5 business days.
5.How can I obtain technical support or documentation for MAX6801UR28D3+T?
For technical support, including MAX6801UR28D3+T datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your MAX6801UR28D3+T requirements.
6.How does Aetrix verify that MAX6801UR28D3+T is sourced from the original manufacturer or authorized distributors?
All MAX6801UR28D3+T products on Aetrix are procured from qualified distributors and authorized channels. Our dedicated quality assurance team conducts strict verification, including traceability checks and, if necessary, third-party testing. This ensures that MAX6801UR28D3+T meets industry standards.
7.What is the process for return or replacement of MAX6801UR28D3+T?
All MAX6801UR28D3+T units undergo pre-shipment inspection (PSI). If there is an issue with MAX6801UR28D3+T, returns or replacements are accepted under the following conditions:
1.Quantity discrepancies, incorrect items, or visible external defects (such as breakage or corrosion), acknowledged by Aetrix.
2.The issue is reported within 90 days of delivery.
3.The MAX6801UR28D3+T part is unused and in its original packaging.
Return procedure for MAX6801UR28D3+T:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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